pagebreak breaks PowerPoint

[arthurgailes]

Bug description

---
format: pptx
---

# A page
Some stuff


{{< pagebreak >}}

# Another page

some more stuff

This renders a PowerPoint that needs to be repaired, omitting the pagebreak does not. Hurts when rendering across formats, eg pdf and powerpoint.

Steps to reproduce

No response

Expected behavior

No response

Actual behavior

No response

Your environment

No response

Quarto check output

---

format: pptx

A page

Some stuff

{{< pagebreak >}}

Another page

some more stuff

[mcanouil]

I am not sure the page break shortcode has the right OpenXML code for PowerPoint.

Word and PowerPoint don't use the same OpenXML code to do the same thing for some reason.

Could you also fill the issue template as requested and properly format your post as showed when filling the template?

See https://quarto.org/bug-reports.html#formatting-make-githubs-markdown-work-for-us.

[mcanouil]

Why do you want to use this shortcode in PowerPoint instead of using what's described in the documentation?

https://quarto.org/docs/presentations/powerpoint.html

For instance, the headers level does not imply the same thing in presentation formats.

Project profile would be the way here as you might have some layout to tweak in PowerPoint while not needed in PDF.

Note that the shortcode documentation ever stated PowerPoint was supported, so this is not a bug, but an enhancement is possible.

https://quarto.org/docs/authoring/markdown-basics.html#page-breaks

[mcanouil]

The issue is caused by the default value used by the shortcode which is a form feed character \f which appears to not be written properly (or not understood at all which makes sense) in a PowerPoint document.

• fix: \f form feed character ({{< pagebreak >}}) not valid in PowerPoint (pptx) #11896

[cderv]

Thanks @mcanouil ! Indeed \f does not seem appropriate for pptx output. I guess pagebreak shortcode was not expected to be used in pptx context.

This could be reported and fix upstream too :

• https://github.com/pandoc/lua-filters/blob/master/pagebreak/pagebreak.lua

And I'll do the same in rmarkdown:

• https://github.com/rstudio/rmarkdown/blob/main/inst/rmarkdown/lua/pagebreak.lua

[arthurgailes]

Why do you want to use this shortcode in PowerPoint instead of using what's described in the documentation?

https://quarto.org/docs/presentations/powerpoint.html

For instance, the headers level does not imply the same thing in presentation formats.

I would like to output the same document in both PDF and Powerpoint, iteratively. In Psuedocode:

---
format: 
  pptx: true
  typst: true
---

## A title that works in both

Some text that works in both

{{< pagebreak >}}

## The title in both, but page divider only in ppt

If only I could use pagebreak, I'd be happy in `r params$state`.